BB,

I like to snow ski and I get head aches that occur about the same road every trip..at 6,500'msl. Never before and been going to the same place for 40 years. They last 2 to 3 hours and disappear just as mysteriously as the arrive.

As far as running goes I'll relay my experience. I think my exercise related symptoms are more related to length of time at higher aerobic levels than activity. Tennis allows you some recovery time between bursts of energy...running is a constant output for an extended time. I have had to run a little slower and it does help with headaches. I compensated for
Running slower by adding incline. I will say I cannot endure running on the street since my accident, it just plain ole pounds my head.

I have the same results swimming if I don't allow for some short breaks to lower breathing/heart rate. I don't find it detrimental to fitness, just a different way of getting there than pre accident.

Bud